January weather forecast
South Chatham, MA

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Weather in January

January, the same as December, is a wintry winter month in South Chatham, Massachusetts, with temperature in the range of an average low of 31.6°F (-0.2°C) and an average high of 39°F (3.9°C).

Temperature

South Chatham's coldest season falls during January and February, averaging a high-temperature of 39°F (3.9°C).

Humidity

The average relative humidity in January in South Chatham is 75%.

Rainfall

In South Chatham, during January, the rain falls for 9.5 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, in South Chatham, Massachusetts, there are 142.4 rainfall days, and 22.09" (561mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In South Chatham, in January, snow falls for 6 days, with typically accumulated 1.34" (34mm) of snow. Throughout the year, there are 20.8 snowfall days, and 4.37" (111mm) of snow is accumulated.

Daylight

In South Chatham, the average length of the day in January is 9h and 34min.
On the first day of the month, sunrise is at 7:06 am and sunset at 4:20 pm. On the last day of January, sunrise is at 6:53 am and sunset at 4:53 pm EST.

Sunshine

In South Chatham, the average sunshine in January is 4.5h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 2 in January converts into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
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Frequently asked questions

What is the coldest time of year in South Chatham?

The months of January and February are noted for their lowest temperatures in South Chatham, with an average high-temperature of 39°F (3.9°C).

How cold is it in South Chatham in January?

In South Chatham, 39°F (3.9°C) is the average high-temperature and 31.6°F (-0.2°C) is the average low-temperature during January.

What is the average humidity in January in South Chatham?

In South Chatham, the average relative humidity in January is 75%.

How many days does it rain in January in South Chatham?

In South Chatham, during January, the rain falls for 9.5 days and regularly aggregates up to 1.69" (43mm) of precipitation.

How many days does it snow in January in South Chatham?

In South Chatham, Massachusetts, in January, snow falls for 6 days, with typically accumulated 1.34" (34mm) of snow.

How many hours of daylight does South Chatham have in January?

The average day length in January in South Chatham, Massachusetts, is 9h and 34min.

When are sunrise and sunset in January in South Chatham?

On the first day of January in South Chatham, sunrise is at 7:06 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 4:53 pm EST.

How long on average sun shines in January in South Chatham?

In South Chatham, Massachusetts, the average sunshine duration in January is 4.5h.

What is the month with the lowest UV index in South Chatham?

The months with the lowest UV index in South Chatham, Massachusetts, are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in January in South Chatham?

In South Chatham, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
South Chatham, MA

Average temperature in January - South Chatham, MA
  • Average high temperature in January: 39°F

The warmest month (with the highest average high temperature) is August (71.6°F).
The months with the lowest average high temperature are January and February (39°F).

  • Average low temperature in January: 31.6°F

The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).

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Average pressure in January
South Chatham, MA

Average pressure in January - South Chatham, MA
  • Average pressure in January: 29.99"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in January
South Chatham, MA

Average wind speed in January - South Chatham, MA
  • Average wind speed in January: 18mph

The windiest month (with the highest average wind speed) is January (18mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).

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Average humidity in January
South Chatham, MA

Average humidity in January - South Chatham, MA
  • Average humidity in January: 75%

The months with the highest relative humidity are June and July (85%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in January
South Chatham, MA

Average rainfall in January - South Chatham, MA
  • Average rainfall in January: 1.69"

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is November (1.46").

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Average rainfall days in January
South Chatham, MA

Average rainfall days in January - South Chatham, MA
  • Average rainfall days in January: 9.5 days

The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in January
South Chatham, MA

Average snowfall in January - South Chatham, MA
  • Average snowfall in January: 1.34"

The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
South Chatham, MA

Average snowfall days in January - South Chatham, MA
  • Average snowfall days in January: 6 days

The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in January /
Average sunshine in January
South Chatham, MA

Average daylight in January / Average sunshine in January - South Chatham, MA
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in January: 4h and 3min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).

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Average sunshine days in January
South Chatham, MA

Average sunshine days in January - South Chatham, MA
  • Average sunshine days in January: 13 days

The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is January (13 days).

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Average UV index in January
South Chatham, MA

Average UV index in January - South Chatham, MA
  • Average UV index in January: 2

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in January
South Chatham, MA

Average cloud cover in January - South Chatham, MA
  • Average cloud cover in January: 52

The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in January
South Chatham, MA

Average visibility in January - South Chatham, MA
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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South Chatham, Massachusetts, USA

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